Handbuch der Botanik - Schenk, A. (August), 1815 -1891 (E. Trewendt, 1879)

The Harbinger - Illinois Native Plant Society. (Illinois Native Plant Society, 2013)

Herbertia - American Plant Life Society. ([American Plant Life Society], 1994)

Herbertia - American Plant Life Society. ([American Plant Life Society], 1996)

Herbertia - American Plant Life Society. ([American Plant Life Society], 1998)

Herbertia - American Plant Life Society. ([American Plant Life Society], 2000)

Historia naturalis bulgarica - Bŭlgarska akademii︠a︡ na naukite. (Bulgarska akademiia na naukite, 1995)

Historia naturalis bulgarica - Bŭlgarska akademii︠a︡ na naukite. (Bulgarska akademiia na naukite, 1997)

Hortus suburbanus calcuttensis. A catalogue of the plants which have been cultivated in the Hon. East India company’s botanical garden, Calcutta, and in the Serampore botanical garden ... from the beginning of both establishments (1786 and 1800) to the end of August 1841 ... - Voigt, J. O. (Jahann Otto), 1798 -1843 (Bishop's College Press, 1845)

Host plants of leaf beetle species occurring in the United States and Canada : (Coleoptera: Megalopodidae, Orsodacnidae, Chrysomelidae, excluding Bruchinae) - Coleopterists Society. (Coleopterists Society, 2004)

How to know Western Australian wildflowers : a key to the flora of the extratropical regions of Western Australia - Grieve, Brian John 1907 -1997 (University of Western Australia Press, 1900)

Human poisoning from native and cultivated plants - Duke University Press. (Duke University Press, 1974)

Human poisoning from native and cultivated plants - Duke University Press. (Duke University Press, 1969)

Ice Breaker Magazine - Malcolm Wallhead; Associates (Malcolm Wallhead and Associates, 2010)

Iheringia. Série zoologia - Fundação Zoobotânica do Rio Grande do Sul. Museu de Ciências Naturais. (Museu Rio-Grandense de Ciências Naturais, Divisão de Ciências do Departamento de Ciência e Cultura, Secretaria de Estado dos Negócios da Educação e Cultura do Govêrno do Estado do Rio Grande do Sul, 1967)

Illinois Natural History Survey bulletin - Illinois. Natural History Survey Division (The Survey, 2007)

The Illinois Natural History Survey reports - Illinois. Natural History Survey Division (Natural History Survey, Illinois Institute of Natural Resources, 2001)

An illustrated dictionary of scientific terms - Rossiter, William, 1897 (G. P. Putnam's Sons, 1878)

Illustrated manual of proposed endangered and threatened plants of Utah - U.S. Fish; Wildlife Service (Denver, Colorado, 1979)

Index herbariorum - International Association for Plant Taxonomy (Published and Distributed for International Association for Plant Taxonomy by New York Botanical Gardens, 1990)